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(No Model.) 2 SheetsShee tv1. J. SHERIDAN. 1 4

EVENER FOR RAILWAY HEADS. x

No. 381,284. 4 PatentedAprrl'L1888.

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, 2 Sheets-Shet 2 J. SHERIDAN. I v -EVENYER FOR RAILWAY HEADS. v N0. 381,284. I Patented A r; 17. 1.888;

N PEIERS, PholoUllwgrzphnr. wa-m n nnnnn c 11 UNITED STATES,

JAMES SHERIDAN, or NEWTO MASSACHUSETTS, ASSlGNOR To" THE PATENT OFFICEQ j PE'ITEE MACHINE WORKS, OF SAME PLACE; i

Q EV\ENER FOR RAILWAY-HEADS. I

, sPncIPIcA-rronr forming part of. Letters Patent. No., 3e1,2a4,' dated April 11, 18 88. Application filed June 27, 1887. sail-.11 No. 242 5205. (No model.)

To all whom it may concern.-

Be it known that I, JAMES SHERIDAN, of Newton, in the county of Middlesex and State of Massachusetts, a citizen of the United States,

5 have invented certain new and useful Improvements in Eveners forRailway-Heads, of which the following is a specification. t

My invention relates to improvements in the construction of eveners for railway-heads L to be used in connection with carding machinery; audit has for its object to simplify and improve the construction of such devices.

As is known to those familiar with the art to which my improvement relates, there is a r class'of machines or appliances now in use for evening or regulating the speed of the roller by which the sliver is drawn, which .includea cone-pulley, a belt driven therefrom and trans mitting motion to the drawing-roller, and mechi anism 1 by which I the belt is shifted laterally upon the cone-pulley to vary the speed of the .roller by means of two ratchet wheels mounted upon a common shaft, and 'twopawls, one for moving each of the ratchet-wheels, these pawls I 2 5 being held away from the ratchet-wheels by a pivoted guard-piece, the position of which is regulated by the tension of the sliveras it passes through the trumpet. By this construction, when the-tension is normal, the guard- 3 piece is interposed between both pawls and,

their respective ratchets; but if the tension becomes greater or less than normal the guardpiece is correspondingly shifted by means of a lever on which the trumpet is mounted, to allow one or the other of the pawls, which have" a constant motion, to'engage with and drive its ratchet-wheel. The rotary'motion of these ratchet-wheels thus obtained is transmitted by suitable apparatus to and'regulates the posi- 0 tion of the belt upon the cone-pulley. It is to improvementsin this apparatus for'so transmitting motion from the ratchet-wheels'to the belt-guide that my present invention relates.

Heretofore the driving motion from the 5 ratchetvwhee'ls has been transmitted to the belt-guide by means ,of a screw formed upon the shaft on which the ratchet-wheels are,

mounted and engaging with a nut in the beltguide, as shown in Letters PatentNo. 86,719, of February 9, 1869. This construction has been found defectivein several respects,v and it is the object of my presentinvention to provide a mechanism whereby these defects are obviated. g

In the drawings, Figure lis a front view, and, Fig, 2 an end'view, of the mechanism embody-j ing my improvements. I

Areprese'nts the cone-pulley, and Bthe belt.

G and O are the ratchet-wheels, mounted upon a common shaft, D.

piece.

the shaft D'of the ratchet-wheels, and which turns with them, a beveled gear, G, arranged,

' to engage with a second beveled gear, H,which revolves upon a stud attached to the frame of the machine in which the shaft D is supported and which carries asprocket-wheel, I, audits'qo chain J. This chain is connected with-asliding belt-guide, K, which surrounds the belt B and slide'sit to and fro upon the pulley.; J

At the other endof the chain I preferto'employ a second sprocket-wheel, L, although any, 7

other suitable form of roller for giving tension to the chain may be substituted. 'loallow for convenientadj ustment in the length of the chain and to take up slack, I attach one or both of its ends to the belt-guide bymeans'of 8o hooks M, threaded and provided with lock-- nutsm. r By means of the substitution of the endless chain, sprocket-wheels, and beveled gearsyas described, for the screw'ofthe'old machine 8 an important improvement is made in the efficiency and economyof the device as a whole.

In previous machines in which the screw was used it has been found that when rapid work- I ingnis desired the screw must be of so quick a go pitch, and consequently acts with so much strain, that the teeth of the ratchets are often broken. Furthermore, with such a construc 'tion there is great waste of power followed by corresponding excessive wear', which'soon pro- 9 5 duces so much looseness between'the screw and its nut that thebelt-guide moves too late, Y and when this result is reached the machine is unfit for use. By my present improvement the 'belt guide is moved more efficiently, with too I i By my present'improvement Iprovide upon.

E and E arethe pawls, and F istheguardwith their pawls E E and mounted upon a common shaft, of .the beveled gears G H, the latter carrying the sprocket-wheel I, an endless chain, J, engaging with said sprocketwheel and attached to a sliding belt-guide which surrounds and moves-the belt, a suitable tension-roller for giving tension to the chain, and a rod or sliding support for the beltguide, all substantially as set forth.

2. The combination, for the purposes described, of the belt-guide K, provided with a suitable sliding support or rod, the endless chain attached to the said guide and provided with devices for taking upthe slack, as described, the tension sprocket L, and the sprocket I, mounted upon the beveled gear H, whereby the motion to andfro is imparted to the belt-guide, and the belt is thereby moved correspondingly to regulate the speed of the drawing-roll.

In testimony whereof I have hereunto subscribed my name this 18th day of June, A. l). 35

\Vitnesses:

J. HENRY TAYLOR, E B. TOMLINSON.

JAMES SHERIDAN. 

